Placeholder[name] represents a placeholder labeled with name that indicates a place to type.Placeholder[] gives the empty placeholder \[Placeholder].
PlaceholderReplace is an option to Paste that determines whether to replace a selection placeholder with the selected contents.
Plain
(Built-in Mathematica Symbol) Plain represents a font that is not bold, italic, or underlined.
Play
(Built-in Mathematica Symbol) Play[f, {t, t_min, t_max}] creates an object that plays as a sound whose amplitude is given by f as a function of time t in seconds between t_min and t_max.
PlayRange is an option for Play and related functions which specifies what range of sound amplitude levels should be included.
Plot3D
(Built-in Mathematica Symbol) Plot3D[f, {x, x_min, x_max}, {y, y_min, y_max}] generates a three-dimensional plot of f as a function of x and y. Plot3D[{f_1, f_2, ...}, {x, x_min, x_max}, {y, y_min, ...
PlotLabel is an option for graphics functions that specifies an overall label for a plot.
PlotLayout is an option used by WaveletListPlot and similar functions to specify the layout of multiple plots.
PlotMarkers is an option for graphics functions like ListPlot and ListLinePlot that specifies what markers to draw at the points plotted.
Plot
(Built-in Mathematica Symbol) Plot[f, {x, x_min, x_max}] generates a plot of f as a function of x from x_min to x_max. Plot[{f_1, f_2, ...}, {x, x_min, x_max}] plots several functions f_i.